* Due to the TSConfig file renaming in #3791 and the fact that they were merged at the same time, the path in the closure-compiler script is now invalid.
* build: run closure-compiler
* Adds a script that runs the closure-compiler against the devapp / demo-app.
* The script will run on the CI as a new mode. Ensuring that all our components are closure-compatible.
Fixes#1206.
* Address feedback